本文へ移動

サイトナビゲーションへ移動

検索ボックスへ移動

サイドバーへ移動

ここは、本文エリアの先頭です。

Gas-Liquid Two Phase Flow Behavior Related to ECLSS

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23ECWU77

Subject Category: Cooperative Graduate School System

PDF available here

  • Responsible Representative: Masato Sakurai, Manager for ECLSS
  • Contact Information: Masato Sakurai(sakurai.masato@jaxa.jp)
  • Members: Motoharu Kusano, Gaku Murakami, Masato Sakurai

Abstract

Elucidate the effects of gravity on gas-liquid two-phase flows to develop separation techniques for gas-liquid two-phase flows generated by the operation of the Environment Control and Life Support System (ECLSS).

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

In order to evaluate the performance of gas-liquid separation technology, it is necessary to evaluate the microscopic physical phenomena of gas-liquid two-phase flows under microgravity. Large-scale and high-speed numerical simulations are essential for this study on Earth, and the vast computational resources provided by JSS are important.

Achievements of the Year

To develop a gas-liquid separator mechanism for the Sabatier reaction in an air regeneration system, a gas-liquid separator using capillary forces was modeled and its performance was evaluated by numerical simulation ( Fig. 1 ). The operation of the gas-liquid separator was reproduced by combining hydrophilic and hydrophobic particulate porous media and injecting gas-liquid two-phase flow from the top ( Fig. 2 ).

Annual Reoprt Figures for 2023

Fig.1: Simulation model reproducing a capillary force driven gas-liquid separator.

 

Annual Reoprt Figures for 2023

Fig.2: Simulation visualization results (Gas: 900 ml/min, Liquid: 100 ml/min)

 

Publications

– Poster Presentations

“Numerical simulation of gas-liquid separation device under gas-rich conditions considering carbon dioxide reduction system” 67th Space Science and Technology Conference

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: OpenMP
  • Number of Processes: 144 – 324
  • Elapsed Time per Case: 24 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.42

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 0.00 0.00
TOKI-ST 3335120.88 3.60
TOKI-GP 0.00 0.00
TOKI-XM 586.95 0.32
TOKI-LM 0.00 0.00
TOKI-TST 0.00 0.00
TOKI-TGP 0.00 0.00
TOKI-TLM 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 245.00 0.20
/data and /data2 133020.00 0.82
/ssd 2510.00 0.24

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 2.73 0.01

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

 

ISV Software Licenses Used

ISV Software Licenses Resources
ISV Software Licenses Used
(Hours)
Fraction of Usage*2(%)
ISV Software Licenses
(Total)
47.31 0.02

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report February 2023-January 2024